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Properties of asphalt mixtures containing various fibers
The effects of fiber modifiers on the performance of asphalt mixtures were investigated. Cellulose fiber, polyester fiber, and basalt mineral fiber were adopted as modifiers, and the dynamic modulus test, indirect tension fatigue test, and wheel track test were conducted in order to study the properties of asphalt mixtures containing various fibers. The test results indicate that the viscoelastic property of asphalt mixtures can be improved by the addition of fiber modifiers, which resulted in an increase of the dynamic modulus and a reduction in the phase angle. Dynamic modulus master curves also confirmed that fiber addition caused a general increase in the dynamic modulus for all mixtures evaluated within the range of the loading frequency, especially at low frequencies. The fatigue property and rutting resistance of fiber modified asphalt mixtures could be enhanced significantly. Based on the results presented in this paper, the following conclusions can be drawn: 1. The rheological properties of asphalt mixtures were affected by the addition of fiber modifiers. The dynamic modulus was increased and the phase angle was reduced in fiber modified asphalt mixtures, which indicates that the stiffness of the asphalt mixture was enhanced and the elastic portion of the viscoelastic property was increased. 2. The dynamic modulus and phase angle of fiber modified asphalt mixtures could be predicted using a semilog model. 3. Dynamic modulus master curve results confirm that a general increase in the complex dynamic modulus is observed in asphalt mixtures containing various fibers within the loading frequency range, especially at lower frequencies. 4. The fatigue properties of fiber modified asphalt mixtures were improved significantly, especially at lower stress levels. The dynamic stability of asphalt mixtures containing various fibers was increased by 30 % to 40 % relative to that of the unmodified asphalt mixture.
Properties of asphalt mixtures containing various fibers
The effects of fiber modifiers on the performance of asphalt mixtures were investigated. Cellulose fiber, polyester fiber, and basalt mineral fiber were adopted as modifiers, and the dynamic modulus test, indirect tension fatigue test, and wheel track test were conducted in order to study the properties of asphalt mixtures containing various fibers. The test results indicate that the viscoelastic property of asphalt mixtures can be improved by the addition of fiber modifiers, which resulted in an increase of the dynamic modulus and a reduction in the phase angle. Dynamic modulus master curves also confirmed that fiber addition caused a general increase in the dynamic modulus for all mixtures evaluated within the range of the loading frequency, especially at low frequencies. The fatigue property and rutting resistance of fiber modified asphalt mixtures could be enhanced significantly. Based on the results presented in this paper, the following conclusions can be drawn: 1. The rheological properties of asphalt mixtures were affected by the addition of fiber modifiers. The dynamic modulus was increased and the phase angle was reduced in fiber modified asphalt mixtures, which indicates that the stiffness of the asphalt mixture was enhanced and the elastic portion of the viscoelastic property was increased. 2. The dynamic modulus and phase angle of fiber modified asphalt mixtures could be predicted using a semilog model. 3. Dynamic modulus master curve results confirm that a general increase in the complex dynamic modulus is observed in asphalt mixtures containing various fibers within the loading frequency range, especially at lower frequencies. 4. The fatigue properties of fiber modified asphalt mixtures were improved significantly, especially at lower stress levels. The dynamic stability of asphalt mixtures containing various fibers was increased by 30 % to 40 % relative to that of the unmodified asphalt mixture.
Properties of asphalt mixtures containing various fibers
Eigenschaften von Asphaltmischungen mit verschiedenen Faserstoffen
Ye, Qunshan (author) / Guan, Hongxin (author)
2012
7 Seiten, 7 Bilder, 6 Tabellen, 26 Quellen
Conference paper
English
Properties of Asphalt Mixtures Containing Various Fibers
| British Library Online Contents | 2012
Investigation of rheological and fatigue properties of asphalt mixtures containing polyester fibers
| Online Contents | 2008